Well, more or less but that has nothing to do with this. While full on, LED's running on AC current still flash at either 60 or 120 times a second depending on if they are either half or full wave. LED's running full on on DC don't flash at all. Now when it comes to dimming, there are many ways to vary the voltage in the DC world, especially with low current devices. Since LED's are current sensitive devices, a variable constant current device will dim them with no flashing at all.